Means for anchoring bolts



ocr, 16, 192s.

R. A. MIRZAN MEANS FOR ANCORING BOLTS Filed July 12, 192'? Patented Ict. i6, 1928.

UNITED STATI-:s

RICHARD A. MIBZAN, F SYBACUSE, YORK.

MEANS Fon nivonoiirrer BoLTs.

Application filed July 12,

This invention relates to bolt; anchors, designed especially for securing bolts or rods tov stone, brick, and concrete construction, and has for its particular object to improve and simplify the anchoring means described and shown in my United States Patent No. 1,629,880, dated May 24, 1927. A further object is to provide an extremely simpleand reliable anchor` which may be applied to bolts or rods of different size, and driven Vin a.l hole by force, such ashammer blows. A further object is to provide a powerful anchor comprising a number of `similar sheet steel or iron units, which` may beV readily stamped by suitable dies and maybe employed singly or collectively in connection.

with either threaded or plain bolts; the said units beingformed with common interlitting or nesting' portions that enable the units to be spaced sulliciently to allow them to flex, and facilitate the stacking of the units, and also rthe welding'of said portions, for rendering the assembled anchor movable as one part, V'aswell as for strengthening and obviating distortion of thev anchor; the said units being substantially circular, perforated centrally, and slitt'ed radially, beyond the welded portions to provide a number of similar sectors or arms adapted to be flexed and inclined at angles calculated to resist longitudinal movement ot the bolt; the arms of the adjacent units when stacked being parallel and disposed at right angles to the axis of the bolt, and being normally spaced when welded for enabling said arms to flex, as well as assume different angles relatively to each other when the units are inserted in a hole in concrete or other anchorage. And a further' object is to provide a series of circular anchor units having a common diameter that normally exceeds the diameter of the molded or drilled opening that receives the anchoring units, whereby, when the bolt and anchor are driven axially into the narrower soclretor opening of roclr or concrete, Vthe sectors or arms automatically assume vther proper inclination or angle for efectually resisting longitudinal as well as radial stresses L Vlrlhe various features and partsfof the invention will be understood from the de tailed description that follows, and by reference to the accompanyingv drawing, in whichf Figure l is a viewshowing a bolt thread- 1927. Serial N0. 205199 fitted witha number of supcrposed units. the' latter comprising a central .longitudinal section, the said parts being disposed concentric to andready to be driven intoan opening formed in a bed of concrete. Fig. Q-,is asimilar View, showing the bolt and anchoring unitsvembedded in the concrete,

and the opening flooded with grout. Fig.

3 is a central vertical section, showing the construction of asingle unitprior to being threaded. Fig. 4 is a plan .view of one of the units as it comes from the blanking die. Fig. 5 is a reduced plan view of one of the units shown in Fig. 2. Fig. 6 is a view Vsimilar to Fig. l, showing unt-hreaded units mounted upon a tube, and the latter being internally threaded to receive the bolt. Fig. '.7 is a similar view, in which the bolt passes loosely through a number of unthreaded units, which areheld in place b opposing nuts that" engage the bolt. Andy Fig. 8 is still another modification in which a number ot' unitsv are 'threaded to the bolt, the arms of the units being initially inclined or dished in order to acilitatecentering the anchoring means relatively to the opening inthe concrete, and the said opening being filled withy grout immediately before the bolt and units arev inserted.y Y v f In the drawing, 2 represents a slab or mass of concrete, in which a hole 2 has been drilled to receive a threaded bolt, as 3, and the anchoring means comprising a number of similar sections or units, as 4, the latter being adjustably mounted on the bolt. `Each unitV 4 consists of a substantially circular sheet metal'body having a central opening 4 surrounded by an unbroken ring-like portion 4, the body 'p beyond the said ring being slotted radially at regular intervals, as at 4", to provide fan-shaped sections orv wings 4. The ring 4a and the inner end-portions of the sectors 4C are preferably depressed to provide a concave socket a that `surrounds the opening 4', -the walls of the socket a: preferably having an inclination of and the' sockets Voi the adjacent units adapted toV interlit or nest-when a number of the units are stacked,

as shownfin Figsl and 2, the arrangement of saidsockets being such that when the units are superposed, the sectors or wings 4c become spaced and parallel, the said sectors being preferably disposed at right anglesto the bolt 3. In order to facilitate `handling a number of the units comprising an anchor,

as well as to materially strengthen the anchor, the concave portions 4"L are preferably electrically welded, as indicated at 4d in Figs. 1 and 2. y

After the units 4 are velded, the elongated opening 4 is preferably reamed and threaded for adjustable attachment to the bolt 3, as shown in Figs. 1 and 2. This assembly of the anchor and bolt is then disposed directly over the mouth of the hole 2 of the concrete or rock, and the operator gradually sinks the parts into the hole by any means such as moderate hammer-blows, until the bolt and anchor come to rest upon the bottom of the hole. In practice, the diameter of the opening 2, relativ-ely to that of the anchor is preferably so calculated as to insure the proper inclination of the sectors 4, which may range from 2Oo to 45, according to the character and requirements of the anchor. Ordinarily, the anchor is sunk a short distance below the top surface of the concrete, as shown in Fig, 2, and the opening 2 may be thereafter flooded with grout, as 2X, but this practice is not always required or followed. rllhe anchor herein shown and desribed will resist almost an stress that may be applied to the bolt without giving away. lVhen the bolt and anchor units, as well as the opening in the concrete, are` properly proportioned, the bolt will break, or the concrete will fracture, when said parts are subject to longitudinal stress, before the anchor will be destroyed.

Figs. 1, 2, 3 and 4 illustrate the preferred construction and arrangement of the anchor wherein the` essential features are shown, and whereby the most powerful anchoring is edected. As long yas the diameter of the stacked units exceeds that of the hole 2', force must be applied to sink the bolt and anchor into the prepared opening. The discrepancy between the diameters of the Yunits 4 and the hole in the concrete, may be varied at will. But it will be understood that one of the essentially novel features of the present invention includes an anchoring element of greater cross-sectional area than the opening in the anchorage, said anchoring ele- `ment required to be forced into the hole in the anchorage in order to cause the sectors 4c to flex and become inclined at an angle that is substantially less than the normal disposition of the parts when they are first assembled, as shown in Fig. 1. 4

In Fig. 6 is shown a modification consisting principally of mounting a number of units, as 6, upon a tube. the ends of the tube preferably being expanded and clinched,v as at 6, in order to hold the units in place, and the tube G being internally 'threaded for attaching, and forradjusting the vanchor relatively to Va bolt 3. The opening '2? in. the concrete is ypreferably smaller than the units, the same as in Fig.

1, and the parts must therefore be driven into the said opening. Y

In Fig. 7, unthreaded units 7 are mounted upon a bolt 3a, the units being held in place by opposing nuts 7', which are preferably threaded to the bolt. In this view, the units are also larver'than the opening in the concrete, and the parts must be driven, as eX- plained. Y

In Fig. Sithe units 8 are threaded in dividually and applied one byrone to the bolt and the parts are thereafter driven into the opening 2 of the concrete, the said. opening preferably being first filledV with fresh grout, as 8, and the excess groutoverflowing the opening during ythe sinking Vof, the anchoring parts.

Having thus described my invention what I claim is f Y 1. An anchor for bolts and the like including a bolt-like member, a disk having a central opening to receive said member and disposed at substantially right angles to the longitudinal axis of the member, said disk having the central lportion thereofadjacent the opening extending at an acute angleV to the member and toward the normallyinner end thereof, and means to rigidly secure the disk to the member, said disk being formed of bendable material and adapted to engage the face of a body having a hole of less diameter than that of the disk, whereby upon driving ofthe member into the hole, the outer portion of the disk will be bent to be at substantially the angle of the said lcentral portion of the disk.

f2.` An anchor for bolts and the like includ. lng a bolt-l1ke member, a disk having a ceneV tral opening to receive said member' anddisposed at substantially right angles to the y longitudinal axis of the member, and means to rigidly secure the disk to the member, said disk being` formed of bendable material andV adapted to engage the face of a body having afhole of less diameter than that of the disk, wherebyupon driving of the member into the hole, the outer portion of the disk will be bent-to be4 at substantially an acutel anglo to the longitudinal axis of the member.

3. An anchor for bolts and the like including a bolt-like'member, a disk `having a central opening to'receive said member and disposed at substantiallyv right angles to the longitudinal axis of thermember, means to rigidly secure the disk to the member, said disk being formed of bendable material and adapted to engage the face of a body having a hole of less diameter than that of the disk, whereby upon driving of the member into the hole, the outer portion ofthe disk will be bent to be tt-substantially an acute ,angle to the longitudinal axis ofthe member, and means to facilitate bending the disk lupon driving of the member. ,Y

4. An anchor for bolts and the like ineluding a. bolt-like member, a series of disks each having a central opening to `receive saidV member, said disks being' Welded together in spaced relation to each other, and being formed of bendable material and adapted to engage the face of a body having a hole of less diameter than that of the disks, whereby upon driving of the member into the hole the outer portions of the disks Will be bent to lie at substantiallyv an acute angle to the longitudinal axis of the member and means to secure the Welded portions of the disk' to the bolt-like member.

In testimony whereof I afIiX my signature.

RICHARD A. MIRZAN. 

